<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta http-equiv="X-UA-Compatible" content="ie=edge" />
    <title>后盾人</title>
  </head>
  <body></body>
  <script>
    let Lesson = {
      site: "后盾人",
      lists: ["js", "css", "mysql"],
      show: function() {
        // console.log(this.site);
        // console.log(this.lists);
        // const self = this;
        return this.lists.map(function(value) {
          // console.log(this);
          // console.log(this.site);
          return `${this.site}-${value}`;
          // console.log(this);
        }, this);
      }
    };
    console.table(Lesson.show());
  </script>
</html>
